Method and means for storing paper pulp coming from the wet machine



J. E. HANNY April 14, 1931.

METHOD AND MEANS FOR STORING PAPER PULP COMING FROM THE WET MACHINE Filed Aug. 5, 1929 2 Sheets-Sheet 1 Z a d M a J. E. HANNY 1,800,215

METHOD AND MEANS FOR STORING PAPER PULP COMING FROM THE WET MACHINE April 14, 1931.

Filed Aug. 5, 1929 2 Sheets-Sheet 2 Q P o N o e N 7 D TJI r Duunpu b 0 5 9 flwswo m H Q00 00 0 R 000 U 0 O 0 D 0 U D a 0 n0 00 00 00 00 0 .U

Patented Apr, 14, 1931 UNITED STATES PATENT orrics 3' 01m EDWARD mm, Qll' OREGON CITY, OREGON, ASSIGNOR 1'0 CROWN WELAMETTE EAPEB comm, OF SAN FRANCISCO, OALIIORNIA, A CORPORATION OF DELAWARE mnon AND WE FOB STORING PAPER PULP COMING FBOI THE WET mom's Application filed August 5, 1929. Serial 10. 388,500.

10 making machine.

As well known in the art, the pulp for making paper is first converted into coarse sheets on the wet machine and then stored for later refinement, as required, for

15 delivery to the storage tank of the paper making machine.

The present neral mode of so storing coarse sheets 0 pulp consists in taking these sheets, as they come from the wet machine, and folding or lapping the same into small bundlescalled laps; then piling such laps'in a stack from which later portions are taken to a shredder, so as to shred or reduce the laps into small particles, and the shredded material is then delivered to the storage tank of the paper making machine. Such method is both unduly expensive, and more or less destructive of an appreciable portion of the pulp. The undue expense is caused by the necessity of having to truck the laps to the stack pile. The loss is occasioned by the laps stacking more or less in layers having air spaces between them, into which dust can enter. And, it is further believed that the e margins of the laps provide more or ess a suitable medium for the growth of bacteria. So frequently, before the laps are removed from the stack, their edges become discolored to such an extent that their surfaces must be scraped OE; and such discoloration tends to read throughout the body of the laps, so that laps which have been stored for some time can onl be used up in small quantities, by being ributed in fresher ulp; and even then the grade of paper prouced is frequently lowered.

My improved method consists in taking relatively small portions of the coarse pulp as delivered by the wet machine-these plementary shredding sedsmall portions being known in the trade as noodles and depositing such noodles on a belt conveyor, from which the noodles are discharged into a blast of air moving at high velocity, and discharging through a charger, by which the noodles are disintegrated into small particles; and the blast of air then functions further to carry the disintegrated pulp, in the form of small particles, to a distant point, where the material is discharged in the form of a spray to form a pile for storage. It will thus be wen that only the work of discharging the noodles of the pulp delivered from the wet machine into said blast of air discharging through said charger is required. No supdevices are required;

and the shredding o pulp into the desired of the latter at small particles and storing the distantis accomplis ed in a single operation.

Furthermore, tests from moisture content of the pulp as it comes from the wet machine and as it is discharged by the blast of air at the place of storage, show that the pulp loses an appreciable amount of moisture; that is, such tests have shown that the moisture content of the paper pulp while on the conveyer belt is approximately 21.5% air dry, while after having been blown onto the pile at the place of storage is 24.9% air dry, which in my opinion promotes, to some extent the storing of the pulp in a loosely packed pile.

Furthermore by my method of storage, the pile of pulp is sealed on all sides, so that the interior of the pile is protected against deterioration from the causes mentioned.

Furthermore, the pulp from the wet machine is stored in the form of a lightly packed mass from which portions may be readily taken for delivery to the storage tank of the paper making machine. By the old method above described, in which the pul coming from the wet machine is stored int c form of laps, these laps tend to pack down into a very solid mass, especially at the lower part of the pile so that the lower layers can frequently be removed only by the aid of a pick Furthermore, since by my improved method the pulp from the wet machine is stored in the form' of a relatively lightly compressed mass, portions may be readily removed therefrom by sluicing by a suitable hydraulic pulp and the sluiced ofi' pulp portionscarrled by the water emptied into a suitable ditch or trench, from which it may then be readily ILIIIJIDPGd to the storage tank of the aper ma g machine.

The evices which I employ for carrying my method into practice, are hereinafter fully described with reference to the accompanying drawings.

In the drawings:

Fig. 1 shows a diagram of a combination of devices used by me for carrying out my improved storage method;

V ig. 2 shows a diagrammatic vertical section of the charger element of the pressure blower by which a continuous blast of air moving at high velocity is operatively aplied to the masses of pulp or noodles ropped from the wet machine into said charger;

Fig. 3 shows a top view of said charger; and

Fig. 4 shows a horizontal section through the charger on the line 44 of Fig. 3.

In Fi 1 a represents a storage chest into which t e screened stock comin from the grinders of the pulp mill is delivered. 1) represents a pump delivering through a pipe 0, the stock from the storage chest to one or more wet machines d, or any sheet-forming equipment reducing the moisture con.- tent of the stock taken from the storage chest. The pulp is scraped from the press roll of the wet machine by means of a doctor e as usual, and is dropped onto a belt conveyer f by which the scraped oflt' portions of pulp or noodles are delivered to the charger 9 of the pressure blower h.

The charger 9 comprises, as shown by Figs. 2 to 4, a hollow cylinder or drum 2 which is revolved b suitable means about a central vertical sha 3. The interior of the drum is provided with radial vanes 4 thereby dividing the same into radially disposed pockets 5.

The drum revolves between a stationar top plate 6 and a stationary bottom plate and is rotated by any means as for example a chain r. An air tight sliding joint is understood to be provided between the revolvmg orum and t e top plate.

The said top and bottom plates are respectively provided on one side with registering openings 8 and 9. These openings register with the air blast inlet conduit 2' and the outlet conduit The opposite side of the top plate is rovided with an .opening 11 over which is provided a hopper 12, into which the noodles 12 carried by the belt conveyer f are discharged, and thus dropped into one of the pockets of the firm, which pocket by the revolution of the drum is in the next instant laced in registration with the said air blast inlet and the outlet openings.

The conduit 2', as shown by Fig. 1, is connected with the pressure blower h whereby an ample blast of air moving at high velocity is continuously discharged on the pulp carried by the registering pocket of the drum 2. As a result, the force of the blast of air striking the mass of pulp in such pocket, disintegrates or shreds the same into small particles, which are then blown out through the outlet 9 of the charger, intoand through the conduit 7', and by the latter said. particles are discharged in the form of a spray at the place of storage, making a pile as represented by q in Fig. 1.

Preferably the discharge conduit is provided with a nozzle is having a universal joint m permitting the nozzle to be manipulated as desired. In this way, the deposit of pulp may be controlled as convenient, and so as to make several piles if desired.

The mass of stored pulp is relatively lightly packed, so that portions thereof may later be readily removed for conveying to the stora e tank of the paper making machine. uch removal may be effected by sluicing, and the mass of removed pulp run into a pum pit o from which it may then be pumped y means of a pump 11. and conduit s to the storage tank of the paper making machine.

As mentioned, in the transit of the disintegrated pulp from the charger gthrough the discharging conduit j, the pulp loses an appreciable portion of its moisture content which in my opinion, has some bearing in causing the discharged pulp particles to.

pack in the form of a relatively lightly compressed mass at the place of storage.

. I claim:

1. Pulp storing meanscomprising, in combination, an air-pressure element adapted to generate a contlnuous blast of air moving at hi h velocity, said air-pressure element including a charger, means for delivering portions of pulp into said charger, said charger comprising a .driven drum whose interior is divided into radially disposed pockets adapted successively to be positioned to receive the blast from said airpressure element, means confining the discharge from said air pressure element to the inlet side of one of the ockets of said drum, and a conduit leading rom the charger to a distant point.

2. Pulp storing means comprising, in combination, an air-pressure element adapted to generate a continuous blast of air moving at higllli1 velocity, said air-pressure element inclu g a charger, means for delivering portions of pulp into said charger, said:

charger comprisin a drivendrum whose interior is divided into radially disposed pockets adapted successively to be positioned to receive the blast from said airpressure element, a plate through which the air-pressure element discharges into the charger, an air tight joint between the inlet side of the pockets of said drum and said plate, and a conduit leading from the charger to a distant point.

. 3. Pulp storing means comprising, in combination, an air-pressure element adapted to generate a continuous blast of air moving at high velocity, said air-pressure element including a charger, means for delivering portions of pulp into said charger, said charger comprising a driven drum whose interior is divided into radially disposed pockets adapted successively to be positioned to receive the blast from said air-pressure element, a plate through which the air-pressure element discharges into the charger, an air tight joint between the inlet side of the pockets of said drum and said plate, a conduit leading from the charger to a distant point and the extremity of the conduitbeing provided with a 'ointed nozzle.

J O EDWARD HANNY. 

